平凹透镜是一种具有负焦距的透镜,具有一个平面和一个凹面。它通常用于发散光束。透镜中间比边缘薄,导致光线在通过时发散,而不是像凸透镜那样会聚。
平凹透镜的主要特性是负焦距,这使其主要用于光束准直,增加或减小焦距以及扩大或缩小图像。为了使球面像差、昏迷和像散最小化,通常在高能激光系统中采用平凹透镜以减少从表面会聚的残余反射光的可能性。
平凹透镜通常用于光束扩展,投影和增加光学系统的焦距。根据具体要求,平凹透镜可以设置有或没有抗反射涂层,使其适用于可见光,近红外光和特定波长的应用。例如,熔融二氧化硅适用于紫外线应用,而单晶氟化钙对于某些波长应用是理想的。
规格 | 商业级规范. | 高精度规格. |
材料 | UV玻璃 (石英、熔融石英) | |
VIS glass (Schott、CDGM、OHARA等) | ||
直径 | Ø5mm ~ Ø600mm | |
直径公差 | ± 0.1mm | ± 0.05mm |
焦距公差 | ± 2% | ± 1% |
表面质量 | 60/40 | 40/20 |
偏心 | <3 arc min | <1arc sec |
表面图 | 3λ | 2λ |
表面不规则 | 1/4 λ | 1/10 λ |
通光孔径 | > 85% | > 90% |
倒角 | <0.2mmx 45° | <0.1mm x 45° |
涂层 | 根据客户的要求 |
类型编号 | 直径 | 焦距 | 边缘厚度 | 中心厚度 | 后焦距 | 曲率半径 |
φD( mm) | f( mm) | Te( mm) | Tc( mm) | fb( mm) | r( mm) | |
BK7-6-6 | 6 | -6 | 5.5 | 2.0 | -7.37 | 3.11 |
BK7-6-12 | 6 | -12 | 4.2 | 2.0 | -13.3 | 6.22 |
BK7-10-15 | 10 | -15 | 3.5 | 2.0 | -16.3 | 7.79 |
BK7-10-20 | 10 | -20 | 3.3 | 2.0 | -2.3 | 10.38 |
BK7-10-30 | 10 | -30 | 2.8 | 2.0 | -31.3 | 15.57 |
BK7-12.7-15 | 12.7 | -15 | 5.3 | 2.0 | -16.3 | 7.79 |
BK7-12.7-20 | 12.7 | -20 | 4.2 | 2.0 | -21.3 | 10.38 |
BK7-12.7-25 | 12.7 | -25 | 3.7 | 2.0 | -26.3 | 12.98 |
BK7-12.7-30 | 12.7 | -30 | 3.4 | 2.0 | -31.3 | 15.57 |
BK7-15-30 | 15 | -30 | 3.9 | 2.0 | -31.3 | 15.57 |
BK7-20-30 | 20 | -30 | 5.6 | 2.0 | -31.3 | 15.57 |
BK7-20-50 | 20 | -50 | 4.0 | 2.0 | -51.3 | 25.95 |
BK7-25.4-30 | 25.4 | -30 | 8.6 | 2.0 | -31.3 | 15.57 |
BK7-25.4-50 | 25.4 | -50 | 5.3 | 2.0 | -51.3 | 25.95 |
BK7-25.4-100 | 25.4 | -100 | 3.6 | 2.0 | -101.3 | 51.90 |
BK7-25.4-300 | 25.4 | -300 | 2.6 | 2.0 | -301.3 | 155.70 |
BK7-25.4-1000 | 25.4 | -1000 | 2.1 | 2.0 | -1001.3 | 502.4 |
BK7-30-40 | 30 | -40 | 8.4 | 2.0 | -41.3 | 18.40 |
BK7-30-60 | 30 | -60 | 5.9 | 2.0 | -61.3 | 27.60 |
BK7-30-100 | 30 | -100 | 4.2 | 2.0 | -101.3 | 46.00 |
BK7-40-50 | 40 | -50 | 11.4 | 2.0 | -51.3 | 23.00 |
BK7-40-60 | 40 | -60 | 8.0 | 2.0 | -71.3 | 27.60 |
BK7-50-70 | 50 | -70 | 13.0 | 3.0 | -72.0 | 32.20 |
BK7-50-80 | 50 | -80 | 11.4 | 3.0 | -82.0 | 36.80 |
BK7-50-100 | 50 | -100 | 9.4 | 3.0 | -102.0 | 46.00 |
BK7-50.8-70 | 50.8 | -70 | 15.4 | 3.0 | -72.1 | 32.20 |
BK7-50.8-80 | 50.8 | -80 | 13.4 | 3.0 | -82.0 | 36.80 |
BK7-50.8-100 | 50.8 | -100 | 10.6 | 3.0 | -102.0 | 46.00 |
类型编号 | 直径 | 焦距 | 边缘厚度 | 中心厚度 | 后焦距 | 曲率半径 |
φD( mm) | f( mm) | Te( mm) | Tc( mm) | fb( mm) | r( mm) | |
JGS1-10-15 | 10 | -15 | 4.1 | 2.0 | -16.4 | 6.90 |
JGS1-10-20 | 10 | -20 | 3.5 | 2.0 | -21.4 | 9.20 |
JGS1-10-30 | 10 | -30 | 2.9 | 2.0 | -31.4 | 13.80 |
12.7 | -15 | 5.9 | 2.0 | -16.4 | 6 .. 90 | |
JGS1-12.7-20 | 12.7 | -20 | 4.2 | 2.0 | -21.4 | 9.20 |
JGS1-12.7-25.4 | 12.7 | -25.4 | 4.9 | 2.0 | -27.2 | 11.90 |
JGS1-20-30 | 20 | -30 | 6.3 | 2.0 | 31.4 | 13.80 |
JGS1-20-50 | 20 | -50 | 4.3 | 2.0 | -51.4 | 23.00 |
JGS1-20-100 | 20 | -100 | 3.1 | 2.0 | -101.4 | 46.00 |
JGS1-20-150 | 20 | -150 | 2.7 | 2.0 | -151.4 | 69.00 |
JGS1-25-50 | 25 | -50 | 5.7 | 2.0 | -51.4 | 23.00 |
JGS1-25-80 | 25 | -80 | 4.2 | 2.0 | -81.4 | 36.80 |
JGS1-25-100 | 25 | -100 | 3.7 | 2.0 | -101.4 | 46.00 |
JGS1-25.4-30 | 25.4 | -30 | 10.4 | 2.0 | -11.4 | 13.80 |
JGS1-25.4-200 | 25.4 | -200 | 2.88 | 2.0 | -201.4 | 92.00 |
JGS1-25.4-400 | 25.4 | -400 | 2.44 | 2.0 | -401.3 | 184.00 |
JGS1-25.4-1000 | 25.4 | -1000 | 2.05 | 2.0 | -1001.3 | 460.00 |
JGS1-50-100 | 50 | -100 | 3.0 | 10.4 | -92.8 | 46.00 |
JGS1-50-400 | 50 | -400 | 3.0 | 4.7 | -396.7 | 184.00 |